Full reference: F. S. MacNeil. 1960. Tertiary and Quaternary Gastropoda of Okinawa: A comparison of the late Miocene, Pliocene, and Pleistocene Gastropoda of Okinawa with related faunas of East Asia together with a resume of the geological setting of the fossiliferous deposits. United States Geological Survey Professional Paper 339:1-148
Sister taxon: Nihonia pervigo
Type specimen: USNM 562751, a shell. Its type locality is USGS 17445, Yonabaru, which is in a Pliocene offshore claystone in the Yonabaru Formation of Japan.
Ecology: epifaunal carnivore
• Pliocene of Japan (1 collection)
• Miocene of Japan (2)
Total: 3 collections each including a single occurrence